Here's why:
* Open syllable: An open syllable ends with a vowel sound.
* Closed syllable: A closed syllable ends with a consonant sound.
In the word "smoky":
* The first syllable "smo" ends with a consonant sound (the "k" sound).
* The second syllable "ky" also ends with a consonant sound (the "k" sound).
Therefore, both syllables in "smoky" are closed syllables.